And it does not work. The context variable has not been assigned and with sub-gallery's TemplateFill [If(ThisItem.IsSelected,Navy,RGBA(56, 96, 178, 1))] it seems all first records in sub-gallery have been selected and I could not find out why? EditForm returns no result.
Can I ask how the referencing works for collection created by GroupBy & nested gallery? Also with the nevigate how to test if the variable has been assigned corretly? Please help!